PIC18F2321-I/SO Microchip Integrated Circuit (Small Outline Packages) In Stock
PIC18F2321-I/SO is a Microchip 8-bit PIC18 microcontroller with 8 KB Flash program memory, 512 bytes SRAM, and a 10-bit ADC in a 28-pin SOIC package. It operates up to 40 MHz clock frequency and includes USART, SPI, and I2C interfaces with 2.0 V to 5.5 V supply range. From $1.85 in stock with worldwide shipping available.
- Manufacturer
- Microchip
- Package
- Small Outline Packages
- Pin Count
- 28
- Lifecycle
- ACTIVE
- Datasheet
- PIC18F2321-I/SO Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- 8 KB Flash program memory with self-write capability for field firmware updates
- 10-bit ADC with up to 10 channels enabling precision analog signal acquisition
- Up to 40 MHz clock operation with PIC18 enhanced instruction set for efficient C-code execution
Applications
PIC18F2321-I/SO targets embedded control applications in consumer electronics, industrial automation, and IoT sensor nodes where an 8-bit MCU with analog capability is required. Its 10-bit ADC with multiple channels makes it suitable for data acquisition systems, temperature monitors, and motor speed controls. The SOIC-28 package and 2.0 V to 5.5 V wide supply range simplify integration into both battery-powered and mains-powered designs.
Specifications
| Pbfree Code | Yes |
| Manufacturer Package Code | SOIC-28 |
| Factory Lead Time | 5Weeks |
| YTEOL | 8 |
| Has ADC | YES |
| Bit Size | 8 |
| Boundary Scan | NO |
| CPU Family | PIC18 |
| Clock Frequency-Max | 40MHz |
| DAC Channels | NO |
| DMA Channels | NO |
| Format | FIXED POINT |
| Integrated Cache | NO |
| JESD-30 Code | R-PDSO-G28 |
| JESD-609 Code | e3 |
| Low Power Mode | YES |
| Number of External Interrupts | 3 |
| Number of I/O Lines | 25 |
| Number of Serial I/Os | 1 |
| Number of Timers | 6 |
| On Chip Program ROM Width | 8 |
| PWM Channels | YES |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SOP28,.4 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| RAM (bytes) | 512 |
| ROM (words) | 8192 |
| ROM Programmability | FLASH |
| Screening Level | TS 16949 |
| Speed | 40MHz |
| Supply Current-Max | 23mA |
| Supply Voltage-Max | 5.5V |
| Supply Voltage-Min | 4.2V |
| Supply Voltage-Nom | 5V |
| Surface Mount | YES |
| Technology | CMOS |
| Temperature Grade | INDUSTRIAL |
| Terminal Finish | Matte Tin (Sn) |
| Terminal Form | GULL WING |
| Terminal Pitch | 1.27mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 40 |
| uPs/uCs/Peripheral ICs Type | MICROCONTROLLER, RISC |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | 3A991.A.2 |
| HTS Code | 8542.31.00.01 |
| Country of Origin | Thailand |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for PIC18F2321-I/SO:
RISC Microcontroller, 8-Bit, FLASH, PIC18 CPU, 40MHz, CMOS, PDSO28
RISC Microcontroller, 8-Bit, FLASH, PIC18 CPU, 40MHz, CMOS, PDSO28
RISC Microcontroller, 8-Bit, FLASH, PIC18 CPU, 40MHz, CMOS, PDSO28
28 PIN, 160K Low Power Flash PIC w 32/16K Bytes and 12-bit ADC
RISC Microcontroller, 8-Bit, FLASH, PIC18 CPU, 40MHz, CMOS, PDSO28
RISC Microcontroller, 8-Bit, FLASH, PIC18 CPU, 40MHz, CMOS, PDSO28
Frequently Asked Questions
How much Flash and SRAM does the PIC18F2321-I/SO provide, and what clock speed can it reach?
The PIC18F2321-I/SO provides 8 KB of self-write Flash program memory and 512 bytes of SRAM data memory, sufficient for most embedded control firmware. It operates at clock frequencies up to 40 MHz using the internal oscillator or an external crystal, delivering up to 10 MIPS of instruction throughput with the PIC18 enhanced instruction set. These resources make it well-suited for sensor interface, PID control loop, and protocol bridge applications.
What ADC resolution and channel count does the PIC18F2321-I/SO offer for analog signal acquisition?
The PIC18F2321-I/SO integrates a 10-bit successive-approximation ADC with up to 10 multiplexed input channels, enabling multi-channel analog signal digitization without external ADC components. Conversion time is as fast as 1.6 µs at 40 MHz, supporting real-time sensor sampling in control loop applications. This built-in ADC is ideal for temperature sensing, battery voltage monitoring, and position feedback in servo systems.
What supply voltage range does the PIC18F2321-I/SO support, and does it operate on 3.3 V systems?
The PIC18F2321-I/SO operates across a wide supply voltage range of 2.0 V to 5.5 V, making it compatible with both 3.3 V and 5 V system buses without level shifters. At 3.3 V, the device supports the full 40 MHz clock speed, enabling integration with modern 3.3 V SoCs and sensors. The low 2.0 V minimum supply also supports direct operation from two AA batteries in portable sensor designs.
Which communication interfaces does the PIC18F2321-I/SO include, and what peripheral count does it offer?
The PIC18F2321-I/SO includes USART (supporting RS-232 and LIN protocols), an MSSP module configurable as SPI or I2C, and 2 CCP (Capture/Compare/PWM) modules for motor control and timing. It provides up to 25 general-purpose I/O pins in the SOIC-28 package. Three 8-bit and 16-bit timers round out the peripheral set, enabling multi-task embedded firmware without needing an external UART or SPI bridge.
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